hi all im new to boats was told you all were the very best. i have a 1977 se ray 20ft 351 ford v-8 ( omc 240 ) with omc out drive it has a bad prop and im not sure if its even the right one for the boat? can anyone help me out and tell me what prop pitch ect i need its a pin type prop. help im in the dark and dont know where to start thanks to all who can help paul